Event publish and subscription issue

we have a requirement in which the business service component should publish an event which needs to be handled at the user interface level. when we are publishing the event in the component its not been handled by the subscriber.

Thanks for your reply. my question is whether its possible to use the event broker mechanism with model components being the publishers and the user controls being the subscribers. let us say the employee business class publishes the employeename changed event
and the employee details user control subscribes to the above event and displays the message when the above event is triggered.